def test_try_linkloop(self):
expected_commands = [
"mkdir -p /root/blocks/",
"dd if=/dev/zero of=" "/root/blocks/snap1.blk bs=1M count=512",
"losetup /dev/loop1 /root/blocks/snap1.blk",
]
exists_side_effect = self.exists_side_effect(2)
self.mock_object(os.path, "exists", mock.Mock(side_effect=exists_side_effect))
blockservice.try_linkloop("/dev/loop1")
self.assertEqual(expected_commands, self.cmds)
def _create_snap_dev(self):
LOG.debug("Virtman: creating a snapshot for the VM instance")
if self.snapshot_dev is None:
self.snapshot_dev = blockservice.findloop()
blockservice.try_linkloop(self.snapshot_dev)
if self.snapshot_with_cache:
snapshot_path = self._create_cache(self.snapshot_dev)
else:
snapshot_path = self.snapshot_dev
LOG.debug("Virtman: success! snapshot_path = %s" % snapshot_path)
return snapshot_path
